1966. 2012-01-03T15:31:32Z. 2012-03-05T17:27:49Z. Kehn, Thomas M. U.S. Geological Survey. English. Public. Kentucky, Webster County, Crittenden County, and Caldwell County.
1973. 2012-03-29T19:55:15Z. 2012-05-03T15:34:28Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky, Marion County, Nelson County, and Larue County.
1975. 2012-05-03T12:51:59Z. 2018-02-14T14:18:38Z. Gildersleeve, Benjamin, 1907-2003. U.S. Geological Survey. English. Public. Kentucky, Grayson County, Butler County, and Edmonson County.
1968. 2012-01-30T20:28:56Z. 2012-03-05T17:37:34Z. Rice, Charles L. U.S. Geological Survey. English. Public. Kentucky, Johnson County, Morgan County, and Lawrence County.
1972. 2012-03-29T14:50:29Z. 2012-05-03T15:34:12Z. Johnson, William D., Jr. U.S. Geological Survey. English. Public. Kentucky, Daviess County, and Henderson County.
1966. 2012-01-05T16:07:19Z. 2012-03-05T17:28:53Z. Shawe, Fred R. U.S. Geological Survey. English. Public. Kentucky, Edmonson County, Butler County, and Warren County.
1978. 2012-06-13T14:24:23Z. 2012-06-20T14:07:36Z. Sanchez, Joseph D. U.S. Geological Survey. English. Public. Kentucky, Lawrence County, and Johnson County.
1967. 2012-01-17T18:56:55Z. 2012-03-05T17:34:00Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Kentucky, Madison County, and Fayette County.